Commercial and industrial buildings pose unique motion detection challenges. The combination of large spaces and high ceilings with tough environmental conditions and a high likelihood of vandalism attempts creates a challenging security situation.
In the face of such challenges, interiors of warehouses, large retail and commercial locations, factories and museums all require more advanced detectors than the standard available on today’s market. The detectors need to be more durable and robust, without sacrificing high sensitivity and immunity to false alarms.
Overcoming these challenges is far from straightforward. But, there are solutions that implement sophisticated designs and advanced technologies to address these major issues.
Traditional weak points
There are two common weak spots that leave conventional industrial detectors vulnerable to vandalism: the optical window, which is typically quite large and protruding and therefore relatively easy to mask or break; and the seam between the base and the cover, which can often be easy to pop open with a strong thump.
The Visonic Tower-10/12 detectors avoid these weak spots by changing the design concept. Instead of a window, these detectors have a very small and recessed optical 'V-Slot' that, because of its small size, convex shape and recessed position, is almost impossible to break. The combination of unique anti-spray perimeter grooves around the slot and Visonic’s Active IR Anti-masking technology, ensure that any masking attempt will immediately activate an alarm.
In addition, instead of a hinged closure, the detectors have a strong sliding closure mechanism. The reasoning behind the sliding mechanism is the same reason that high-risk sites, such as jail cells, use sliding rather than hinged doors: instead of single points of connection (the hinges), the two parts are connected along an entire side (the slider). In the detectors, the special sliding mechanism locks the cover into special grooves around the entire circumference of the base, creating an almost hermetic seal.
High sensitivity
The window of conventional detectors is usually large so as to allow a large field of view (FOV). But, despite the small-size slot, the detectors achieve the required FOV and unusually large coverage area of 25 m x 30 m. A combined parabolic-elliptical mirror creates a pattern of curtain-like PIR beams with true creep zones reaching almost all the way under the detector.
The curvatures create a very efficient mirror with high optical gain, enabling the longer range needed in large spaces, such as warehouses and public locations. In addition, it also implements Obsidian Black Mirror technology. This technology works together with the parabolic-elliptical mirror to reduce false alarms due to white light interference coming from car headlights and strong flashlights, while improving detection sensitivity to motion.
For more information contact Visonic, +972 3 6456751, [email protected], www.visonic.com
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